ABC is diving deep this fall with creator Shawn Ryan's "Last Resort" (premieres Thurs., Sept. 27, 8 p.m. ET), a drama that finds the crew of a U.S. military submarine fighting for their lives ... against their own country.

HuffPost TV has an exclusive first look at a very emotional scene from the show's premiere episode, featuring Scott Speedman as USS Colorado's XO Sam Kendal, one of the many defected submarine crew members presumed dead when they ignore less-than-reliable orders to fire a missile at another country and make themselves government enemy No. 1.

Sam's better half, Christine Kendal (Jesse Schram), had begged him not to go back on the boat, and when she receives news of his demise, it's one of the more heartbreaking moments in this very charged drama. Watch the clip above to see her reaction to a call from Sam saying he's OK. From tears to blackouts to shootings, this is one action-packed ride.